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"""fix_mssql_exec_date_rendered_task_instance_fields_for_MSSQL.

Revision ID: 52d53670a240
Revises: 98271e7606e2
Create Date: 2020-10-13 15:13:24.911486

"""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op
from sqlalchemy.dialects import mssql

# revision identifiers, used by Alembic.
revision = "52d53670a240"
down_revision = "98271e7606e2"
branch_labels = None
depends_on = None
airflow_version = "2.0.0"

TABLE_NAME = "rendered_task_instance_fields"


def upgrade():
    """In MSSQL, change execution_date column type to datetime2."""
    conn = op.get_bind()
    if conn.dialect.name == "mssql":
        json_type = sa.Text
        op.drop_table(TABLE_NAME)

        op.create_table(
            TABLE_NAME,
            sa.Column("dag_id", sa.String(length=250), nullable=False),
            sa.Column("task_id", sa.String(length=250), nullable=False),
            sa.Column("execution_date", mssql.DATETIME2, nullable=False),
            sa.Column("rendered_fields", json_type(), nullable=False),
            sa.PrimaryKeyConstraint("dag_id", "task_id", "execution_date"),
        )


def downgrade():
    """In MSSQL, change execution_date column type to timestamp."""
    conn = op.get_bind()
    if conn.dialect.name == "mssql":
        json_type = sa.Text
        op.drop_table(TABLE_NAME)

        op.create_table(
            TABLE_NAME,
            sa.Column("dag_id", sa.String(length=250), nullable=False),
            sa.Column("task_id", sa.String(length=250), nullable=False),
            sa.Column("execution_date", sa.TIMESTAMP, nullable=False),
            sa.Column("rendered_fields", json_type(), nullable=False),
            sa.PrimaryKeyConstraint("dag_id", "task_id", "execution_date"),
        )
